Sequences

Strings are very limited in use due to the fact that their elements must be characters. Because they are immutable, it may be more beneficial to use a list of characters for computation, then join() afterward.

Lists are more common than tuples because they are mutable. There are some cases in which tuples might be preferred:

1. In certain cases, like returning a value, it may be syntactically simpler and more concise to use a tuple.
2. When using a sequence as a dictionary key, an immutable data type must be used, like a string or a tuple.
3. When passing a sequence as an argument to a function, using tuples reduces the potential for bugs due to aliasing.

Because tuples are immutable, they don’t have methods like sort() and reverse(). However, the sequence agnostic sorted() can be used to return a new list with the same elements in sorted order. reversed() can also be used to take a sequence and return an iterator that traverses the list in reverse order.